Tissues Class 9 Notes Science - Chapter 6
Chapter: 6
What Are Tissues ?
A group of cells that are similar in structure and/or work together to achieve a particular function forms a tissue.
Plant Tissues
Meristematic Tissue
(Immature cells capable of divisions)
(Immature cells capable of divisions)
- ➥ Apical Meristem (Present at the growing tips of stems and roots responsible for increase in length)
- ➥ Intercalary Meristem (Present at the bone of internodal regions, responsible for secondary growth)
- ➥ Lateral Meristem (Present in lateral regions, responsible for increase in width of the plant)
Permanent Tissue
(Mature cells incapable of divisions)
- Simple (Made up of only one type of cells)
- ➥ Parenchyma (Living tissue stores and condusts food, water and minerals)
- ➥ Collenchyma (Living tissue provides strength and flexibility to growing part of the plant)
- ➥ Sclerenchyma (Dead tissue, provides mechanical support)
- Complex (Protecting and supporting)
➥ Xylem | ➥ Phloem |
(Conducts water and mineral from the root to the steam and leaves) | (Transport food from the leaves to the other parts) |
|
|
|
|
|
|
|
|
Animal Tissues
Epithelial tissue | Muscular tissue | Connective tissue | Nervous tissue |
(Protective tissue) | (Responsible for movements in body) | (Linking and supporting tissues or organs of body) | (Receives, conduct and transist electrical impulse, made up of nervous or nerve cells) |
Glandular (specialised tissue) | Voluntary muscle |
| |
| (Activities under the control of nervous system) or Skeletal muscle | ||
| |||
Multilayer | Involuntary muscle |
| |
| (Responsible for involuntary movement in body) |
| |
|
|
| |
|
|
| |
Columnar (Pillar like) | |||
| |||
|